Ping failure after PPPoA configuration
Symptom
The PVC state is UP, but after applications like IPoA are configured, the remote node cannot be successfully pinged.
Solution
Make sure the remote node supports the same application as configured on the local node. For example, if the local node uses PPPoA, the remote node should also use PPPoA.
If the remote node supports the same application configured on the local node, make sure the two sides use the same type of AAL5 encapsulation protocol. For example, if one side uses SNAP whereas the other uses MUX, they cannot communicate. You can enable the packet debugging function of ATM to get some clues.